BOULDER, Colo. — Prosecutors want to try a 15-year-old accused in the stabbing death of a 19-year-old woman in northern Colorado as an adult.

The teen was charged with first-degree murder in juvenile court in Boulder Wednesday but prosecutors requested that his case be moved to district court. Because he is under 16, a judge will have to decide whether to allow that.

Prosecutors allege the teen developed a “death list” that included the sister of his victim.

He is accused of fatally stabbing Makayla Grote Saturday night in Longmont and then pursuing her sister, who locked herself in a room.

Prosecutors say police found him about a mile (1.6 kilometers) from the home of another person on the list.

He also allegedly assaulted his grandfather and threatened his mother with a knife the day before the stabbing.

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